Thực hiện phép tính: ​\(\frac{4}{5} - \frac{7}{6} + \frac{{ - 6}}{{15}}\)

* Hướng dẫn giải

Ta có:

\(\;\begin{array}{*{20}{l}}
  \begin{gathered}
  \frac{4}{5} - \frac{7}{6} + \frac{{ - 6}}{{15}} \hfill \\
   = \frac{{4.6}}{{5.6}} - \frac{{5.7}}{{6.5}} + \frac{{ - 6.2}}{{15.2}} \hfill \\
   = \frac{{24}}{{30}} - \frac{{35}}{{30}} + \frac{{ - 12}}{{30}} \hfill \\ 
\end{gathered}  \\ 
  \begin{gathered}
   = \frac{{24 - 35 + ( - 12)}}{{30}} \hfill \\
   = \frac{{ - 23}}{{30}} \hfill \\ 
\end{gathered}  
\end{array}\)